Drive for windup rings of bag machines



Oct. 17, 1950 H. GERSTEIN ETAL DRIVE FOR WINDUP RINGS 0F BAG MACHINES 2 Sheets-Sheet 1 fnverz fors Gersi'ezn/ far); andRaZp lfayczn 7 y 9 'Jhfiforng Filed June 17, 1949 Oct. 17, 1950 H. GERSTEIN ETAL DRIVE FOR WINDUP RINGS 0F BAG MACHINES 2 Sheets-Sheet 2 w 1 1 .i' y. m L v m :1 L!

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anoZR Patented Oct. 17, 1950 Harry Gerstein, New York, and Ralph Kagan, Brooklyn, N. Y., assignors to Spiral Bagging Machine Corporation, New York, N. Y., a corporation of New York Application June 17, 1949, Serial No. 99,726

Claims.

1 This invention relates to new and useful improvements in machines for making spiral wound tubing and has particular reference to a novel means for driving the machine and for-control- .ling the relative motion of the driven parts to obtain synchronism in the driving relation.

This invention is an improvement over the invention shown in U. S. Patent No. 2 406,677, issued August 8, 1946, Gardner and Kagan, entitled Apparatusfor Making Spiral Wound Tubing, and an application Serial No. 20,638, filed April 13, 1948, Gerstein and Kagan, entitled Improvement in Wind-Up Mechanism.

In the operation of the machine shown in the above patent, sheet material is fed on to and around a mandrel in a spiral direction and the initial adjacent turns are sewed together to form a spiral wound tube. 'The spirally turning and advancing tube is flattened out and then advanced to and wound up on a wind-up device, which includes a wind-up roller mounted on a wind-up frame, which must be revolved at an angular speed synchronous with the angularvmotion of the tubular'material around the mandrel while at the same time,the wind-up roller is being rotated to wind-up the material thereon at a linear speed equal to the speed at which the tubing advances along the mandrel. It is clearly apparent that if the revolution of the wind-up frame is not equal to that of the goods around the mandrel, then the goods will be twisted and its feed to the wind-up device will be jammed and the operation interrupted.

Up to the present time, the wind-up frame has been manually turned by a workman who has to stand constantly in position during the operation of the machine and turn the frame so as to keep its revolution in step with that of the goods around the mandrel. This has involvedan expense of about $2,500.00 a year, and involved frequent interruptions'since a workman can not stand and turn the device for indefinite periods without a rest, and' if he neglects his job for a minute the goods gets jammed up, unless the machine is stopped.

It is an object of the present invention there- .fore, to provide simple and efficient means whereby the synchronous revolution of the wind-up frame and the goods around the mandrel may be achieved without the services of this extra operator at the frame all the time. In the normal operation of the machine, an operator stands at the sewingpoint as the goods advances on to the mandrel to oversee the feed of the material and to govern the speed of the sewi g ac ine 2 and the material feed rollers. The invention contemplates mechanically driving the windup frame by means of a motor of predetermined speed and through a speed-change device and enabling the single operator from the one position to change the speed ratio to either speed up ,or slow down the revolution of the frame as the situation may require by merely pressing one or the other of several control buttons at the one position.

In this fashion therefore, one operator may control the entire apparatus and keep the various units of the machine working in synchronism so that the material is fed on to the machine smoothly, sewed into a tube, advanced along the mandrel in a spiral manner, and wound-up in a flattened condition on the wind-up rollerwhile maintaining the revolution of the wind-up frame in substantially accurate'synchronism with that of the material around the mandrel to avoid twisting ofthe goods between the mandrel and ,the wind-up device, and the consequent jam ming of the machine. As a matter of fact, it is entirely possible that the one operator at the sewing position of one machine may also, when experienced, be able to control the operationof another closely related machine of the same type and thus save the expense of two extra operators, which means asaving of at least five thousand dollars a year. 1

As an illustrative example of the invention,.a present preferred form which the invention may assume is shown in the accompanying drawings material and the means for driving th Wind-up frame'and controlling the speed of the same.

I 'In accordance with the disclosures of the patent and application above mentioned, the machine in general includes a mandrel A around which sheet material B is advanced in a spiral fashion. At'a sewing point C, the first two laps of'the material areconnected to form a spirally wound "tube.

The material thus sewed is then continuously advanced spirally around and along the maadrel and Just beyond its end is flattened out .position of the wheel :1 on the bracket Hi. this manner, the relation between the ring [2 by spreaders D and passes between a series of flattening rollers E. to be wound up on a wind-up roller mounted on a wind up shaft F. In the manner shown in the previous cases, the roller shaft F is mounted on a wind-up frame G and is driven by means of a motor H through suitable gear connections. At its front end, the wind-up frame G is supported by means of a ring J which rests by gravity on a series of lower supporting rollers such as [6. Under previous operating conditions, the ring J was provided with hand grips shown in the patent whereby an operator could stand adjacent the ring and turn the ring and the wind-up frame G at a rate synchronous with the revolution of the goods advancing along and around the mandrel, and thus avoid twisting of the goods and jamming of the machine.

' In accordance with the present invention, the wind-up frame G is pivoted for rotation around the axis of the shaft I i of the motor H with the plane of the drive ring J at right angles to the movement of the goods and the center of the rlng substantially in line with the center of the tubular bag being formed on the mandrel A. As

" shown in Figure 2 particularly, the ring J has a drive flange H which rests along its bottom edge on"'the series of rollers l0, which are mounted in a'curved line along the top of a front base bracket plate 13 mounted on the base frame l4. This base frame is provided with rollers i5, which are adapted to lie and move in track members I6 extending transversely of the device, as shown in Figures 1 and 2. Each of the rollers I is in "the form of a double flanged wheel l1 with the drive flange l2 of the ring J resting on the periphery of the wheel i'l between the iianges as shown in Figure 3. Laterally connected to one side of .the wheel H is a hub 58 on which are formed or affixed gears IS and 28, and turnable with the wheel II. This turnable unit is rotatable on shaft. 2! extending through'an elongate slot 21 in the adjacent portion of the bracket l3. The

shaft has an integralcollar 22 adjacent one face .of the bracket and extends through the slot to extend beyond the bracket and receive a tightening nut 23 at the other end. An adjustable set screw 24 "mounted "on the bracket 13 engages theside of the shaft 2! within the slot 2| to adjust the shaft 2! laterally and therefore, the In and the wheels may be regulated since all the wheels may have this form of adjustable mounting if desired, but especially the one at the end The wheels may be connected for positive turning by 'ofthe' series atthe right shown in Figure 2.

.drive mechanism, which somewhat diagrammatically is illustrated herein. In such a form of .speed change and drive device, there is a drive motor and change speed elemen's connected thereto to-drive the shaft 23 and the changes are effectedby reason of the ad rstmet of a s e d shifting screw operated by a hand wheel. These parts which are well known, are not shown herein because they do not in detail enter info the invention, but a small reversible mQQ drive.

mounted in association with the casing of the device 29 and operates the speed shift element therein whatever may be its nature. This device 29 is mounted on a plate 3| connected to the base frame [4 and provided with a roller 32 running in track l6.

At the main position for the operation namely at or adjacent the sewing point of the machine and where the goods advances toward the mandrel, there are disposed several switch boxes and conduits such as 33, 33, 34, 34, 35, 35, and 36. As shown, the source of power is connected to the junction box 34 and is then connected to switch 34, which controls the operation of the sewing machine motor, the motor of the variable speed drive for the wind-up, and the wind-up roller motor drive H. The switch 35 connects and disconnects power to the motor of the variable speed Switch 36 is associated with motor 30 to regulate the fast or slow movement of said motor '33, whereby the speed of the wind-up ring and framefis' varied as desired, to keep it in synchronism with the angular movement of the goods around the mandrel. Switch 33 is connected by conduit 33 to a'junction box 35, and contains wires to control the operation of the motor H.

Electrical conduit 31 extends from the switch 35 to a junction box 38 from which conduits 39, '49 and "lextend. The conduit 39 extendsv to the reversible motor-'30; the conduit 40 leads to the motor inside the speed change device 29; and the conduit 6! leads to the motor H which drives the wind-up roller shaft F. The detail electrical connections are not'shown since they are such as can be made by any experienced electrician, since it is the combination of'the various elements and parts thus described which const tute the invention herein, which enables one man to control accurately and readily the operation of one and quite possible, two machines saving several thousands of dollars a year in labor costs.

In'the operation of this invention, the operator, standing adjacent the material B and the sewing point C, is enabled, through the proper manipulation of the various switches and control buttons above'described, to keep the speed of the material over themandrel in synchronism with the speed of revolution of the wind-up frame G and with th speed of rotation of the wind-up roller shaft F. If the wind-up frame G gets runn ng ahead of the material speed and the goods commences to twist up, the operator merely presses the proper button on the control switch 3 3 so as to move the reversible motor 30 in the proper direction to actuate the speed change device 29 to either speed up the ring J or slow it down. The electrical connections are such that the motor is operated only as long as the buttons are pres-Fed so that the motor 36 maybe operated by very fine degrees and therefore, the amounts by which the wind-up ring J 'may be speeded up or slowed down can be very finely controlled and thus achieve a substantially constant synchronism, so that twisting very seldom occurs. It is such an efficient combination of elements that one operator may con rol two machines with the conseouent saving abo e set forth. Also by preventing twisting of the goods, the goods are more efficiently and firmly packed or roll d up on the wind-up roll on the shaft F and therefore, more goods per roll can be wound up.

While the invention has been described in detail and with respect to the preferred form shown in the drawings, it is not to be limited to, such details and forms since many changes and modifications may be made in the invention without departing from the spirit and scope of the invention in its broadest aspects. Hence, it is intended to cover any and all forms and modifications of the invention which may come within the language or scope of any one or more of the appended claims.

What we claim as our invention, is:

1. An apparatus for making spirally wound bags having amandrel over which sheet material is advanced in a spiral manner and sewn together thereon, with a wind-up frame to receive and roll up the flattened finished tubular bag characterized by the fact that means are provided for advancing the material around the mandrel, means are provided for rolling up the flattened tubular material, and means are provided for revolving the wind-up frame, and that these means are synchronized with each other and under the control of an operator at one position on the apparatus.

2. An apparatus for making spirally wound bags having a mandrel over which sheet material is advanced in a spiral manner and sewn together thereon, with a revoluble wind-up frame to receive and roll up the flattened finished tubular bag characterized by the fact that means are provided to advance the material around the mandrel at a normal speed, and means are provided to revolve the wind-up frame at a normal speed, and that means are provided under the control of the operator to vary the drive of the frame by means of a change speed device connected to the drive mechanism of the frame.

3. An apparatus for making spirally wound bags having a mandrel over whichsheet material is advanced in a spiral manner and sewn together thereon and a revoluble wind-up. frame on which the material formed is rolled up in flattened condition which comprises a drive mechanism associated with the frame to revolve it, a speed change device associated with the drive mechanism, and means under the control of the operator at a single position on the apparatus to control the speed of the material advance over the mandrel, the speed of the material roll-up, as well as the speed of the frame drive mechanism through the intermediary of the speed change device, whereby the various movements are kept in substantial synchronism with a minimum of effort.

4. An apparatus for making spirally wound bags having a mandrel over which sheet material is advanced in a spiral manner and sewn together thereon and a revoluble wind-up frame on which the material formed is rolled up in a flattened condition, which comprises a drive .ring on the frame and having a drive flange, rollers contacting the flange and supporting the drive ring, a motor connected to said rollers for driv-.

and sewn together to form' a spirally-wound tube, means for flattening out this formed tube, a wind-up frame beyond the mandrel and revoluble about the, axis of the mandrel, a, wind-up roller on the frame to receive the flattened material, means for revolving the frame at an angular speed in synchronism with that of the material passing around the mandrel, and means at the operators position to permit his control of the speed of'the frame revolving means.

HARRY GERSTEIN. RALPH KAGAN.

No references cited. 

